Lapis lazuli
ラピスラズリ
天青石
Lapis lazuli
Lapis-lazuli
Glossary
Thematic
Jewellery, Material
A rich blue opaque gemstone often used in watch dials. It is specked with pyrite that looks like gold. Lapis has a hardness of 5.5; it has a specific gravity of 2.4 to 2.9. Lapis lazuli is not a mineral but a rock that contains the minerals lazurite, calcite and hauynite
